191381002 has 16 divisors (see below), whose sum is σ = 305025480. Its totient is φ = 90057024.

The previous prime is 191380993. The next prime is 191381017. The reversal of 191381002 is 200183191.

It can be written as a sum of positive squares in 4 ways, for example, as 181198521 + 10182481 = 13461^2 + 3191^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88 + ... + 19564.

Almost surely, 2^191381002 is an apocalyptic number.

191381002 is a deficient number, since it is larger than the sum of its proper divisors (113644478).

191381002 is an equidigital number, since it uses as much as digits as its factorization.

191381002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19530 (or 19496 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 191381002 is about 13834.0522624428. The cubic root of 191381002 is about 576.2791956825.

The spelling of 191381002 in words is "one hundred ninety-one million, three hundred eighty-one thousand, two".